Collateral for a security interest recorded Nov 23, 2020 (BMO Harris Bank N.A.).
Term ended no later than Dec 10, 2021 · Medium confidence
20-year base term ended Mar 9, 2021
USPTO later recorded it as expired for non-payment on Feb 5, 2024.
Held by Pkware, Inc.
Filed Sep 17, 2004 as application 10/943,270 · Granted Jan 3, 2012
Base term plus 276 days of patent term adjustment (USPTO delay)
Today
Ended no later than Dec 10, 2021
2001
2026
Clock starts
Mar 9, 2001
Mar 9, 2001
Ended no later than
Dec 10, 2021
Dec 10, 2021
Granted
Jan 3, 2012
Jan 3, 2012
base term
patent term adjustment
after the term ends
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
276
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
51
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 276 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. Confidence: Medium. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Mar 9, 2001, when application 09/803,355, the earliest non-provisional in its chain, was filed (this one was filed Sep 17, 2004) | Mar 9, 2021 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +276 days, USPTO patent term adjustment record | Dec 10, 2021 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Feb 5, 2024, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | no later than Dec 10, 2021 | Medium confidence |
This family
| US 6,879,988 | Term ended Dec 2021 | Dec 2021 |
| Application 10/620,960 | Abandoned not computed | not computed |
| US 8,090,942 | this patent no later than Dec 2021 | no later than Dec 2021 |
| US 8,225,108 | Term ended Jun 2026 | Jun 2026 |
| US 7,793,099 | Term ended Jun 2025 | Jun 2025 |
| Application 10/946,271 | Abandoned not computed | not computed |
| Application 10/945,475 | Abandoned not computed | not computed |
| US 7,895,434 | In force Feb 2027 | Feb 2027 |
8 of 51 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Jan 17, 2005 Reel 15599, frame 580 | Peterson, James C. | Pkware, Inc. | Assignment of Assignor's Interest |
| Aug 18, 2009 Reel 23107, frame 510 | Pkware, Inc. | Maranon Capital, L.P., as Agent | Security Agreement |
| Aug 19, 2009 Reel 23107, frame 952 | Pkware, Inc. | Maranon Capital, L.P., as Agent | Security Agreement |
| Dec 23, 2010 Reel 25525, frame 230 | Maranon Capital, L.P., as Agent | Pkware, Inc. | Release of Security Interest |
| Nov 23, 2020 Reel 54501, frame 694 | Pkware, Inc. | BMO Harris Bank N.A. | Patent Security Agreement |
| Jun 3, 2025 Reel 71497, frame 411 | BMO Bank N.A. (F/K/A BMO Harris Bank N.A.), as Agent | Pkware, Inc. | Release of Security Interest Recorded at Reel/Frame 054501/0694 |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 276 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Dec 10, 2021. We will not guess the cap.
Citations
5
later US patents cite this one
That is below the median of utility patents granted in 2012 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. Related patents and pending applications may cover overlapping subject matter.